Internal-combustion-engine piston



` Jan. 25, 1927.

o. E. JoRGl-:NSEN

INTERNAL COMBUSTION ENGINE PISTON Original Filed DGO- 3. 1924 pfff/- Patented Jan. 1927.

UNITED STATES 1,615,459j PATENTk OFFICE.

OLAV ESKIL ITORGENSEN, OF FOREST HILLS. NEW YORK. ASSIGNOR TO WORTHING- TON PUMP AND MACHINERY CORPORATION, 0F NEW YORK, N. Y., A CORIEORATION ouy VIRGINIA.

INTERN'AI;COMBUSTION-ENGINE PISTON.

Griginal application illed December 8, 1924. Serial No. 753593. Divided and this application led .Tune

5, 1925. Serial No. 35.086.

This invention relates to improvements in internal combustion engine pistons, par` 1| while the various partsof thepiston may be readily assembled and disassembled.

With these objects in view, the invention will rst be described in connection with the accompanying drawings showing a .doubleacting piston of the preferred form embodying the invention, and the features forming the invention will then be pointed out in the claims.

In. the drawings- Figure 1 is a vertical central section of the piston and piston rod, and

Figure 2 is a cross section on the l1ne 2-2 of Fig. 1. p

Referring to the drawings, A is the piston the piston construction so that a firm and eiicient/support of all the'parts is secured. A heavy center piece 10 is mounted'on the rod A between the two pistons, preferably by a rib and groove mounting 1, as shown, so that this center piece forms a rigid r'unning member within the 'cylinder liners and between the pistons." This center piece 10 is split into halves for convenient application, the halves being secured Vtogether by bolts 2. On opposite sides of the center piecev 10 the piston rod carries enlargements or heads 11, 12 integrally formed therewith. At the upper end of the pistony rod two heads 11 are formed. so as to provide for water circulation within the piston about the smaller portion ofl the rod between the heads, and the upper piston head1?) is seatedl upon the head '11, with the cylindrical portion 14. of the upper piston that carries 'the piston rings sliding on the lower head y11, with packing to prevent leakage, expansion and contraction of the piston thus rod which supports directly all the parts of4 being provided for. The lower piston rod enlargement or head has the lower piston "head 15 seated on its en d with the cylindrical portion 16 free to slide in packing on -the head 12, .as in the case ofthe upper piston. The upper and lower ypistons are secured to the piston rod heads'or enlargements by bolts 3 extending from the inner side of the piston rod heads into the piston heads 11, 12, the whole piston construction, with center piece 10, thus forming a single unit firmly mounted upon the piston rod.

The piston cooling liquid is supplied in any suitable manner and passes upward through the annular space about the tube 17 within the piston rod A, and from this space through the lower side passages 4 on one side of the diaphragm 5, filling the space in head 12 about tube 17, to the interior of piston head. 15 so as to circulate within the piston head and through the cylindrical portion 16 behind the running port1on and piston rings, and then from the upper side passages 6 in head 12 on the opposite side of diaphragm 5 to the space about tube 17 and through side passages 7 to the interior of the upper piston 13, 14, circulating throughout the piston and within the running4 portion and past the piston rings and thenthrough passages 8 to the rear side of the topkof the piston, returning through tube 17. The whole piston, including the piston heads and the running portion carrying-the piston rings are thus eiciently cooled, each piston"y having its own circulation.

lIt will be obvious that by the construction ofthe piston as described a light yet very strong piston is produced. which ma be readlly assembled and disassembled1 while the piston isl efficiently cooled, and any Alon 'tudinal expansion or contraction of the plston due to temperature changes is '"fully provided for.

In disassembling the piston, it is necessaryonly to remove the entire double-acting piston and the piston rod from the cylinder, take ol the split center piece 10, and then, by removal of the bolts 3, each of the pistons may readily'be removed and the parts Idisassembled.

While in the foregoing specification the invention has been more particularly shown and described as embodied in a vertical engine, it is to be understood that the invention is applicable to horizontal or inclined engines, and that the terms upper and 1. In a double acting internal combustion` engine, the combination, with a piston rod having enlarged portions, and a pair of hollow pistons each having a head secured to the corresponding enlarged portion of the piston rod and having a skirt` the skirts extending from their said heads toward each other, of a ring forming a continuation of the running portion 'of the piston skirts,`

said ring overlapping both skirts exteriorly and arranged tosprevent outward deflection of the said skirts while permitting them to expand and contract.

2. In a double acting internal combustion engine, the combination, with a piston rod having enlarged portions, and a ring directly attached to the piston intermediate said enlarged portions, of a pair of hollow pistons each having a head secured to the corresponding enlarged portion of the piston rod and having a skirt, the skirts extending from their said piston heads toward each other and being arranged to slide telescopically within the ring during expansion and contraction.

3. In a double acting internal combustion 1' engine, the combination, with a piston rod having enlarged. portlons, and a ring d1- rectly attached to the piston intermediate deflection that portion of each skirt adjacentv the ring while perlnitting said sliding movement of the skirts.

4. In a double-acting internal combustion engine, a piston rod having enlargements or heads. a removable ring rigidly secured 4on the piston rod between said heads, and a piston on each side of said ring, each of said pistons consisting of a dome-shaped head rigidly secured to one of the piston rod heads and a cylindrical portion forming the running portion of the piston in the cylinder and having a slidable mounting on the piston rod head to provide for expansion and contraction.

5. `In an internal combustion engine, a piston rod having an enlargement or head, a removable ring rigidly secured on the piston rod and forming a continuation of the running portion of the piston, and a hollow piston with packing rings having its head secured to the piston rod head and having its inner portion slidably mounted on the piston rod head by a water-tight joint, and

cooling Water passages for circulating cooly ing water through the pistonl in close proximity to the 'packing rings and through the head.

In testimony whereof, I have hereunto set my hand.

OLAV ESKIL JORGENSEN. 

